Breath of the Yuki-Onna (4e Power)

From D&D Wiki

The form of a yuki-onna (female spirit of ice) suddenly appears in front of you and breathes a cold, miserable stillness into your enemies hearts.

Encounter Divine, Implement, Cold

Standard Action

Close blast 4

Target: Each creature in blast

Attack: Charisma Vs. Reflex

Hit: 1d10 + Charisma modifier cold damage, and the target must make an acrobatics check of at least 10 + your half level + your Charisma modifier at the beginning of its next turn or else it falls prone.